Python how to prepend element in list to another list of strings -


i have list (list1) follows:

[0, 1, 2]

i want prepend each element list (list2) of strings:

['start|983471|string1|true\n',  'start|983472|string2|true\n',  'start|983473|string3|true\n']

to give:

['0|start|983471|string1|true\n',  '1|start|983472|string2|true\n',  '2|start|983473|string3|true\n']

my code:

finallist = [] x=0 while x < len(list1):     line in list2:         finallist.append("|".join((str(list1[x]),line)))     x+=1

this gives 9 lines. what's wrong? expect each item added.

enumerate , zip work: 

list1 = [0, 1, 2]  data1 = ['start|983471|string1|true\n',  'start|983472|string2|true\n',  'start|983473|string3|true\n']  i, (line, num) in enumerate(zip(data1[:], list1)):     data1[i] = str(num) + '|' + line  print(data1)

output:

['0|start|983471|string1|true\n', '1|start|983472|string2|true\n', '2|start|983473|string3|true\n']

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